Malicious PDF — malware analysis report

Static analysis result for SHA-256 859e964bd04f1e1a…

MALICIOUS

PDF

79.7 KB Created: 2020-12-04 20:03:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: ab09177b6319fa9a089c756f7f148dce SHA-1: 7b6303e661ab9c4c2b1a437d9e88004285779942 SHA-256: 859e964bd04f1e1a91afd6aeb0582c82e616d7fc198ef8efba8e13fd292ada2d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing and trojan threat. The embedded URL points to a suspicious domain, likely serving as a lure for a malicious download. The document body, though partially corrupted, contains text related to 'Install cydia 9.2.13', suggesting a social engineering tactic to trick users into executing a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://trafftec.ru/123?utm_term=install+cydia+9.2.13 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4461780/normal_5fb2c16cc7a5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378827/normal_5f8bb587c90f9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7fe22e5-7750-423b-8502-9a1efb891034/kobayashi_s_dragon_maid_fafnir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba8ca74a-655b-4232-8739-fade8a4f92a9/eso_outfit_change_token.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/965653a7-070b-41f6-a6b7-92692ec4f907/14322924471.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ef77286-195f-434a-bab5-f2c1981e1732/82954801426.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1619768612547ed61873d/t/5fc2fe6e173fb5383b06546a/1606614639457/ace_gangster_2_crazy_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8390a5c8-f51c-43ed-8af4-baea70a4fa87/gubirujuwodelevusajutifar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0326481-5f98-4f5e-bddb-1df2ea50f1b6/schwinn_autocycle_bikes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd015d72f8b574a0f404b7/1606222175183/drift_hunters_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e67d713b-20cf-4051-9922-df92105feeb7/83262658968.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe154fe6d49a06bb593fb5/1606292815753/79017874600.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff29fb0d-1a93-4fb4-8478-5fd225c46237/genetics_review_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a917e6f-68e3-4168-b2cf-eddc3b91afef/wixezinazelidad.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5f9f7acac6192ab88a4d/1606377376018/xarimepapoletisifo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c39f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC39F 17888 bytes
SHA-256: 9586708afb3787946b446cdc8612771bbcee2c19d2983ded0969495888df4dbe
font_01_sfnt_off0000fcd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD8 5412 bytes
SHA-256: 7fa049e1b513ef36044834fa7d716b4418a73e809a86bd151fb6d22036e0c2e5
font_02_sfnt_off00010f5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5D 10156 bytes
SHA-256: ea54093b4132a6d326d091482f779aebea786fc2c6dc325c0b36e013f2396cbd

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